| Index | Illiopolis | Illinois | National |
| Average Test Scores | 38% | 33% | 48% |
| Student/Teacher ratio | n/a | 18:1 | 16:1 |
| Total public schools | n/a | 3,938 | 79,221 |
| Total private schools | n/a | 1,438 | 24,874 |
| Total post-secondary schools | n/a | 306 | 7,963 |
| Index | Illiopolis | Illinois | National |
| Completed 8th grade | 88.1% | 86.2% | 84.3% |
| Completed high school | 85.8% | 84.7% | 83.0% |
| Completed some college | 45.7% | 61.8% | 59.4% |
| Completed associate degree | 19.2% | 40.7% | 38.5% |
| Completed bachelors | 13.3% | 32.9% | 30.3% |
| Completed masters | 5.7% | 12.7% | 11.5% |
| Completed professional degree | 0.0% | 3.4% | 3.3% |
| Completed doctorate | 0.0% | 1.2% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Illiopolis. Using the proficiency score averages, the average test scores for Illiopolis, IL schools is 38%. The average student to teacher ratio is n/a. In Illiopolis, IL, an average of 88.1% of students have completed 8th grade and an average of 85.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Stonington, IL | 671 | 50% | 4.2% |
| Niantic, IL | 657 | 37% | 22.9% |
| Warrensburg, IL | 1,261 | 35% | 26.7% |
| Blue Mound, IL | 1,135 | 30% | 38.5% |
| Macon, IL | 1,091 | 29% | 40.6% |
| Illiopolis, IL | 767 | 38% | 20.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Wilbur, WA | 767 | 55% | 14.1% |
| Kimball, MN | 767 | 64% | 32.3% |
| Minto, ND | 766 | 45% | 6.8% |
| Erick, OK | 768 | 59% | 21.9% |
| London, AR | 768 | 65% | 35.4% |
| Illiopolis, IL | 767 | 38% | 20.3% |
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